low o2s

[shmed]

what could be. the cause of low o2 readings at idle. like in the 100.  range?   new. sensor
an the Wideband to read 17.9. then shut off?


new motor roller cam roller lifters.   tt5.7 chip.  50 lb injs   stock mass meter

[Steve Wood]

sounds like a big air leak somewhere. 

[Scoobum]

Only thing outta whack is your IAC count at 40. Should be 10-20. I'm Scooby Doo asking questions on the other board. You in Toronto? I'm retired...and can drop by.

[Scoobum]

Just what I've noticed swapping 02 sensors. Once the engine comes up to temp...it'll take a couple of minutes for everything to learn. What I do is watch the 02's on the laptop via the graph.

[shmed]

Thanks for the info brad.    id love for you to check out this wreck...
but I'm about 3-4 hours west of Toronto.
So what I. did was block off the exhaust an the intake    put about 5 psi compressed air into the intake track an started soap testing everything ..
when I was about to give up I heard a hiss , so.  I see someone installed an aluminum ear block off plate.   that thing was singing...   offf that. pos came on went a. crude piece of 1/8 steel plate I quickly ground up.   a little silicone,  an fired it up. not up. to par but o2s are in the 600 area. an the Wideband 14ish,


thanks again. Steve an Brad
Dave

[Scoobum]

What town/city are you in?

[Steve Wood]

That egr plate has burn a lot of us

[good2win22]

EGR block off has gotten me twice.  Once on a friends car and then on my barn motor. Then again, I always get gotten

[Scoobum]

I believe this Champion intake I got from my ATR buddy is filled...but I put a fancy ass Turbo 6 cover over it and sealed it as tight as a nuns...well... you know.

[earlbrown]

Brass pipe plugs for me.   There's no way I was going to attempt to use that damn plate. There's just too much leverage against the screw for that thing to work troublefree.